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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8. Note: this package includes the NTRU encryption algorithms.

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package org.bouncycastle.asn1.cms;

import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1GeneralizedTime;
import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Primitive;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.ASN1TaggedObject;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.DERSequence;

/**
 * RFC 5652:
 * Content encryption key delivery mechanisms.
 * 

*

 * RecipientKeyIdentifier ::= SEQUENCE {
 *     subjectKeyIdentifier SubjectKeyIdentifier,
 *     date GeneralizedTime OPTIONAL,
 *     other OtherKeyAttribute OPTIONAL 
 * }
 *
 * SubjectKeyIdentifier ::= OCTET STRING
 * 
*/ public class RecipientKeyIdentifier extends ASN1Object { private ASN1OctetString subjectKeyIdentifier; private ASN1GeneralizedTime date; private OtherKeyAttribute other; public RecipientKeyIdentifier( ASN1OctetString subjectKeyIdentifier, ASN1GeneralizedTime date, OtherKeyAttribute other) { this.subjectKeyIdentifier = subjectKeyIdentifier; this.date = date; this.other = other; } public RecipientKeyIdentifier( byte[] subjectKeyIdentifier, ASN1GeneralizedTime date, OtherKeyAttribute other) { this.subjectKeyIdentifier = new DEROctetString(subjectKeyIdentifier); this.date = date; this.other = other; } public RecipientKeyIdentifier( byte[] subjectKeyIdentifier) { this(subjectKeyIdentifier, null, null); } /** * @deprecated use getInstance() */ public RecipientKeyIdentifier( ASN1Sequence seq) { subjectKeyIdentifier = ASN1OctetString.getInstance( seq.getObjectAt(0)); switch(seq.size()) { case 1: break; case 2: if (seq.getObjectAt(1) instanceof ASN1GeneralizedTime) { date = ASN1GeneralizedTime.getInstance(seq.getObjectAt(1)); } else { other = OtherKeyAttribute.getInstance(seq.getObjectAt(2)); } break; case 3: date = ASN1GeneralizedTime.getInstance(seq.getObjectAt(1)); other = OtherKeyAttribute.getInstance(seq.getObjectAt(2)); break; default: throw new IllegalArgumentException("Invalid RecipientKeyIdentifier"); } } /** * Return a RecipientKeyIdentifier object from a tagged object. * * @param ato the tagged object holding the object we want. * @param isExplicit true if the object is meant to be explicitly * tagged false otherwise. * @exception IllegalArgumentException if the object held by the * tagged object cannot be converted. */ public static RecipientKeyIdentifier getInstance(ASN1TaggedObject ato, boolean isExplicit) { return getInstance(ASN1Sequence.getInstance(ato, isExplicit)); } /** * Return a RecipientKeyIdentifier object from the given object. *

* Accepted inputs: *

    *
  • null → null *
  • {@link RecipientKeyIdentifier} object *
  • {@link org.bouncycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with RecipientKeyIdentifier structure inside *
* * @param obj the object we want converted. * @exception IllegalArgumentException if the object cannot be converted. */ public static RecipientKeyIdentifier getInstance(Object obj) { if (obj instanceof RecipientKeyIdentifier) { return (RecipientKeyIdentifier)obj; } if(obj != null) { return new RecipientKeyIdentifier(ASN1Sequence.getInstance(obj)); } return null; } public ASN1OctetString getSubjectKeyIdentifier() { return subjectKeyIdentifier; } public ASN1GeneralizedTime getDate() { return date; } public OtherKeyAttribute getOtherKeyAttribute() { return other; } /** * Produce an object suitable for an ASN1OutputStream. */ public ASN1Primitive toASN1Primitive() { ASN1EncodableVector v = new ASN1EncodableVector(); v.add(subjectKeyIdentifier); if (date != null) { v.add(date); } if (other != null) { v.add(other); } return new DERSequence(v); } }




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